SpringBoot自定义Starter实现流程详解

starter起步依赖

starter起步依赖是springboot一种非常重要的机制，

它打包了某些场景下需要用到依赖，将其统一集成到starter，

比如，

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>

这就是一个starter，你可以把它看做一个外部外部项目，注意：是外部项目。

starter命名规则

springboot提供的starter以spring-boot-starter-x的方式命名，

自定义starter以x-spring-boot-starter的方式命名，

以区分springboot生态提供的starter。

自定义starter

new module

mystarter-spring-boot-starter

maven项目

添加依赖

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
<version>2.2.9.RELEASE</version>
</dependency>

load maven changes

simplebean

package com.duohoob.bean;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.context.properties.ConfigurationProperties;
/**
* 这两个都是非@Component注解，
* 否则springboot启动时会直接被加载进spring容器
*/
@EnableAutoConfiguration
@ConfigurationProperties(prefix = "simplebean")
public class SimpleBean {
private String id;
private String name;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "SimpleBean{" +
"id='" + id + '\'' +
", name='" + name + '\'' +
'}';
}
}

自动配置类

package com.duohoob.config;
import com.duohoob.bean.SimpleBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class MyAutoConfiguration {
@Bean
public SimpleBean simpleBean() {
return new SimpleBean();
}
}

META-INF\spring.factories

在resources下创建META-INF\spring.factories

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.duohoob.config.MyAutoConfiguration

在spring-boot-mytest中引入mystarter-spring-boot-starter

<dependency>
<groupId>com.duohoob</groupId>
<artifactId>mystarter-spring-boot-starter</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>

load maven changes

添加配置

在spring-boot-mytest的src/main/resources/application.properties中添加配置

通过@Autowired引用

package com.duohoob.springbootmytest.controller;
import com.duohoob.bean.SimpleBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class TestController {
@Autowired
private SimpleBean simplebean;
@RequestMapping("/test")
public String test() {
return simplebean.toString();
}
}

启动访问

来源：https://blog.csdn.net/qq_35549286/article/details/126975665